Ring shank



FIG. 1 is a front elevational elevational view thereof;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a side elevational view thereof; and,

FIG. 4 is a cross-sectional view thereof taken along line 4—4 of FIG. 1.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for ring shank, as shown and described. 